Heat exchange device and energy storage device

Abstract

The utility model discloses a heat exchange device and an energy storage device. The heat exchange device comprises a shell which comprises an inner cavity, an air inlet and an air outlet, and the air inlet and the air outlet communicate with the inner cavity; the heat exchange assembly comprises a condenser, and the condenser is arranged in the inner cavity and located between the air inlet and the air outlet; the cross-flow fan is arranged in the inner cavity and comprises a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet. The noise of the heat exchange device can be reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a heat exchange device and an energy storage device. Background Art

[0002] With the rapid development of new energy technology, energy storage devices have become one of the more important research directions in the field of new energy. As an important device in energy storage devices, the heat exchange efficiency and noise issues of heat exchange devices have attracted much attention. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a heat exchange device and an energy storage device with high heat exchange efficiency and low noise.

[0004] This application is implemented through the following technical solutions.

[0005] The first aspect of the present application provides a heat exchange device, including a shell, comprising an inner cavity and an air inlet and an air outlet connected to the inner cavity; a heat exchange component, comprising a condenser, the condenser is arranged in the inner cavity and located between the air inlet and the air outlet; a cross-flow fan is arranged in the inner cavity, the cross-flow fan includes a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet.

[0006] The cross-flow impeller of the cross-flow fan rotates to take away the heat in the inner cavity of the shell and cool the condenser at the same time. Compared with the axial flow fan arranged in the shell, the cross-flow fan can generate higher air pressure at a lower speed, so that the coverage area of ​​the airflow when flowing through the condenser is larger and more uniform, thereby improving the heat exchange efficiency and reducing noise. In addition, since the cross-flow fan is located in the inner cavity, compared with the axial flow fan arranged outside the shell, the noise can be further reduced.

[0007] In some embodiments, the air outlet is configured as a long strip extending along a first direction, and the extending direction of the rotating shaft of the cross-flow fan is consistent with the first direction.

[0008] By making the extension direction of the rotating axis of the crossflow fan consistent with the length direction of the air outlet, the crossflow fan is more compatible with the air outlet and the air outlet is smoother, which is conducive to further reducing noise and improving heat exchange efficiency.

[0009] In some embodiments, along the first direction, the cross-flow impeller extends from one end to the other end of the air outlet.

[0010] The cross-flow impeller can cover the long strip-shaped air outlet in the direction of the rotation axis, increase the air outlet area, further reduce noise and improve the heat dissipation effect.

[0011] In some embodiments, the cross-flow fan and the condenser are arranged on a side adjacent to the air outlet.

[0012] By arranging the cross-flow fan and the condenser on one side adjacent to the air outlet, the air outlet path is shortened, the air outlet is smoother, and the heat dissipation effect is improved.

[0013] In some embodiments, the maximum distance between the rotation axis of the crossflow impeller and one end of the condenser is equal to the maximum distance between the rotation axis of the crossflow impeller and the other end of the condenser.

[0014] The maximum distance from the rotation axis of the cross-flow impeller to one end of the condenser is roughly equal to the maximum distance from the rotation axis of the cross-flow fan to the other end of the condenser. When the cross-flow impeller rotates, the airflow can cover the entire condenser as evenly as possible when passing through the condenser, thereby increasing the area of ​​the airflow passing through the condenser, improving the heat exchange efficiency of the condenser and reducing noise.

[0015] In some embodiments, the closest distance between the rim of the crossflow impeller and the condenser is greater than or equal to 10% of the radius of the crossflow impeller.

[0016] The appropriate distance between the cross-flow impeller and the condenser helps to force airflow over the entire condenser, accelerate heat dissipation, thereby improving heat exchange efficiency and reducing noise.

[0017] In some embodiments, the condenser includes a first surface facing the crossflow blower, and the first surface includes at least one flat surface or at least one curved surface.

[0018] The curved surface can increase the heat exchange area of ​​the condenser and improve the heat exchange efficiency.

[0019] In some embodiments, a projection of the first surface of the condenser along a second direction on the plane where the air outlet is located at least partially overlaps with the air outlet, and the second direction is perpendicular to the first direction.

[0020] By overlapping the first surface of the condenser with the air outlet, the first surface of the condenser faces the outlet, thereby reducing wind resistance, making air outlet smoother, and reducing noise.

[0021] In some embodiments, the first surface is a plane and is tilted relative to the second direction.

[0022] The inclined condenser can increase the heat exchange area, thereby improving the heat exchange efficiency of the heat exchange device.

[0023] In some embodiments, the first surface is an arcuate surface and partially surrounds the crossflow impeller.

[0024] Such arrangement of the cross-flow impeller and the condenser also helps to increase the heat exchange area while allowing the air flow to be quickly directed out of the shell.

[0025] In some embodiments, the first surface of the condenser is an arc surface, and the rotation axis of the cross-flow impeller coincides with the arc center of the arc surface.

[0026] The rotation axis of the cross-flow impeller coincides with the arc center of the arc surface of the condenser, so that the distance from the rotation axis of the cross-flow impeller to each position of the arc surface of the condenser is the same, thereby further improving the uniformity of the airflow through the condenser, improving the heat exchange efficiency of the condenser, and reducing noise.

[0027] In some embodiments, the shell includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet is located between the first shell wall and the second shell wall, the two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, and the third direction is perpendicular to both the first direction and the second direction.

[0028] The two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, which reduces the possibility of wind leakage between the condenser and the shell, so that more air can pass through the condenser and improve the heat exchange efficiency.

[0029] In some embodiments, the crossflow fan includes a fan housing and a crossflow impeller rotatably disposed in the fan housing, and the fan housing includes an inner guide surface, and the inner guide surface is used to guide the airflow toward the air outlet side.

[0030] The inner guide surface allows the air to be discharged more smoothly from the air outlet, reducing wind resistance and noise.

[0031] In some embodiments, the heat exchange component further includes a compressor, an evaporator and an expansion valve, and the compressor, the condenser, the evaporator and the expansion valve are connected through a refrigerant circulation pipeline.

[0032] Through the refrigerant circulation loop, the heat of the batteries in the energy storage device can be continuously exchanged, reducing the risk of thermal runaway of the batteries.

[0033] A second aspect of the present application provides an energy storage device, comprising: an energy storage box, storing at least one battery; and a heat exchange device as described in any of the above embodiments, the heat exchange device being used to exchange heat with the battery.

[0034] In some embodiments, the heat exchange device is disposed in the energy storage box, and the energy storage box is provided with an exhaust port connected to the air outlet.

[0035] Utility model effect:

[0036] Through the present application, the noise of the heat exchange device can be reduced and the heat exchange efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A schematic diagram of the structure of a heat exchange device provided in some embodiments of the present application;

[0039] Figure 2 An exploded schematic diagram of a battery pack provided for some embodiments of the present application;

[0040] Figure 3 A schematic diagram of the structure of a battery module provided for some embodiments of the present application;

[0041] Figure 4 An exploded schematic diagram of a heat exchange device provided for some embodiments of the present application;

[0042] Figure 5 A schematic side view of a heat exchange device provided for some embodiments of the present application;

[0043] Figure 6 A schematic top view of a heat exchange device provided in some embodiments of the present application;

[0044] Figure 7 A schematic top view of a heat exchange device provided for other embodiments of the present application;

[0045] Figure 8 A schematic top view of a heat exchange device provided in some other embodiments of the present application;

[0046] Fig. 9 A simplified structural diagram of a heat exchange assembly provided for some further embodiments of the present application.

[0047] Description of reference numerals:

[0048] 1000-energy storage device; 110-energy storage box; 120-battery; 1-battery monomer; 2-bottom plate; 3-vertical plate; 4-cover;

[0049] 100-heat exchange device;

[0050] 10-housing; 11-air inlet; 12-air outlet; 10a-inner cavity;

[0051] 20-heat exchange component; 21-condenser; 22-compressor; 23-evaporator; 24-expansion valve; 21a-first end; 21b-second end;

[0052] 30-crossflow fan; 31-crossflow impeller; 32-fan housing;

[0053] O-rotation axis;

[0054] L - The face where the center of the shell lies. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0063] Below, this application is described in detail.

[0064] With the rapid development of new energy technology, energy storage devices have become one of the more important research directions in the field of new energy. As an important device in energy storage devices, the heat exchange efficiency and noise issues of heat exchange devices have attracted much attention.

[0065] A large amount of heat is generated during the operation of the heat exchange device (heat exchange unit), which affects the heat exchange efficiency. The condenser located in the shell of the heat exchange device is the main heat-generating component. At present, the heat generated by the condenser is discharged to the outside of the shell through an axial flow fan. Since the airflow generated by the axial flow fan is relatively concentrated, the uniformity of the airflow passing through the condenser is poor, the noise is too loud, and the heat dissipation is poor, resulting in low heat exchange efficiency of the condenser.

[0066] In this regard, the present application designs a heat exchange device, including: a shell, including an inner cavity and an air inlet and an air outlet connected to the inner cavity; a heat exchange component, including a condenser, the condenser is arranged in the inner cavity and is located between the air inlet and the air outlet; a cross-flow fan, arranged in the inner cavity, the cross-flow fan includes a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet.

[0067] The heat generated during the operation of the condenser is removed by a cross-flow fan. Compared with an axial flow fan, the airflow passes through a larger and more uniform area of ​​the condenser, thereby improving the heat dissipation effect and the heat exchange efficiency of the condenser and reducing noise.

[0068] The heat exchange device of the present application can be applied to an energy storage device for heat exchange with the battery in the energy storage device. Since the heat exchange efficiency of the heat exchange device is improved and the noise is reduced, the heat exchange efficiency with the battery in the energy storage device is also improved, and the noise of the entire energy storage device is also reduced.

[0069] The energy storage device of the present application can be applied to renewable energy storage fields such as electric power storage, photovoltaic energy storage and wind power storage, and can also be applied to fields such as electric vehicle charging.

[0070] Reference Figure 1 The energy storage device 1000 may include an energy storage box 110 and at least one battery 120 stored in the energy storage box 110. The energy storage device 1000 may also include a heat exchange device 100, and the heat exchange device 100 is used to exchange heat with the battery 120, so as to perform thermal management on the battery 120. The energy storage device 1000 may be an energy storage container or an energy storage cabinet.

[0071] Reference Figure 2 and Figure 3 The battery 120 mentioned in the embodiment of the present application may be a battery cell 1 .

[0072] The battery cell 1 may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0073] The battery cell 1 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0074] The battery cell 1 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0075] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0076] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0077] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0078] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0079] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0080] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0081] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as a metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0082] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0083] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0084] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0085] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0086] In some embodiments, the battery cell 1 further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0087] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0088] In some embodiments, the electrode assembly is a laminate structure.

[0089] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0090] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0091] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0092] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0093] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0094] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0095] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0096] In some embodiments, the battery cell 1 may include a battery housing. The battery housing is used to encapsulate components such as electrode assemblies and electrolytes. The battery housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0097] As an example, the battery cell 1 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0098] In some embodiments, the battery housing includes an end cap and a battery casing, the battery casing is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as an electrode assembly and an electrolyte. The battery casing may be provided with one or more openings. One or more end caps may also be provided.

[0099] In some embodiments, at least one electrode terminal is disposed on the battery housing, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab, or indirectly connected to the tab through a transition component. The electrode terminal may be disposed on the end cap, or on the battery housing.

[0100] In some embodiments, a pressure relief mechanism is provided on the battery housing, and is used to release the internal pressure of the battery cell.

[0101] Reference Figure 3 The battery 120 mentioned in the embodiment of the present application may be a battery module, which includes one or more battery cells 1 to provide a single physical module with higher voltage and capacity. When there are multiple battery cells 1, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar. Multiple battery cells 1 are arranged and fixed to form a battery module.

[0102] Reference Figure 2 The battery 120 mentioned in the embodiment of the present application may be a battery pack, which includes a battery box and at least one battery cell 1, and the battery cell 1 is accommodated in the battery box. The battery box may include a bottom plate 2, a vertical plate 3 and a cover 4, and the cover 4 is arranged above the bottom plate 2 and the vertical plate 3, so that the bottom plate 2, the vertical plate 3 and the cover 4 together form a storage space for accommodating the battery cell 1.

[0103] Below, refer to Figures 4 to 9 Some embodiments of the present application are described in detail.

[0104] The embodiment of the present application provides a heat exchange device 100 , including: a housing 10 , a heat exchange assembly 20 and a cross-flow fan 30 .

[0105] The housing 10 includes an inner cavity 10a and an air inlet 11 and an air outlet 12 connected to the inner cavity 10a; the heat exchange component 20 ( Fig. 9 The condenser 21 is arranged in the inner cavity 10a and located between the air inlet 11 and the air outlet 12; the cross-flow fan 30 is arranged in the inner cavity 10a, and the cross-flow fan 30 includes a rotatable cross-flow impeller 31, and the cross-flow impeller 31 is located between the condenser 21 and the air outlet 12.

[0106] The housing 10 has an inner cavity 10a formed therein for accommodating the heat exchange assembly 20 and the crossflow fan 30, and also serving as an air duct connecting the air inlet 11 and the air outlet 12. The air outlet 12 can be a fully open or partially open side of the housing 10. The air inlet 11 can be located on the opposite side or adjacent side of the air outlet 12. Figure 4 The housing 10 is in a rectangular parallelepiped shape, and the narrower side of the rectangular parallelepiped forms an air outlet 12.

[0107] The condenser 21 is located between the air inlet 11 and the air outlet 12. The condenser 21 may have a windward surface on the windward side and a leeward surface (also called a first surface) on the leeward side. The windward surface is the surface close to the air inlet 11, and the leeward surface is the surface close to the air outlet 12.

[0108] The cross flow fan 30 is disposed between the condenser 21 and the air outlet 12 , and the cross flow impeller 31 of the cross flow fan 30 may be oriented toward the leeward side of the condenser 21 .

[0109] The cross-flow impeller 31 rotates, driving the air flow from the air inlet 11 into the inner cavity 10a, and flows from the windward side of the condenser 21 to the leeward side, and then is discharged from the shell 10 through the air outlet 12, thereby taking away the heat in the inner cavity 10a and cooling the condenser 21.

[0110] The cross-flow fan 30 removes the heat in the inner cavity 10a and cools the condenser 21. Compared with an axial flow fan, a cross-flow fan can form a higher air pressure at a lower speed, so that the airflow passes through a larger and more uniform area of ​​the condenser, reducing wind resistance, thereby improving heat exchange efficiency and reducing noise. In addition, since the cross-flow fan 30 is located in the inner cavity 10a, compared with an axial flow fan arranged outside the shell 10, the noise can be further reduced.

[0111] In some embodiments, see Figure 4 and Figure 5 The air outlet 12 is configured as a strip extending along a first direction, and the extending direction of the rotation axis O of the crossflow fan 30 is consistent with the first direction. The first direction may be, for example, a vertical direction. The air outlet 12 may be an opening on one side of the housing 10 .

[0112] By making the extension direction of the rotation axis O of the crossflow impeller 31 of the crossflow fan 30 consistent with the length direction of the air outlet 12, the crossflow fan 30 and the air outlet 12 are more adaptably arranged, so that the air outlet is smoother and more uniform, further reducing noise and improving heat exchange efficiency.

[0113] In the embodiment of the present application, Figure 4-Figure 9 In the figure, for the convenience of description, the cross flow fan 30 only exemplarily shows the structure of the cross flow impeller 31 and a part of the fan casing 32, and other structures of the cross flow fan are omitted.

[0114] In some embodiments, along the first direction, the cross-flow impeller 31 extends from one end of the air outlet 12 to the other end.

[0115] Thus, the cross-flow impeller 31 can cover the long air outlet 12, thereby increasing the air outlet area, further reducing noise, and improving the heat dissipation effect.

[0116] In some embodiments, the cross-flow fan 30 and the condenser 21 are disposed adjacent to the air outlet 12 .

[0117] By arranging the cross-flow fan 30 and the condenser 21 at a position adjacent to the air outlet 12, the air outlet distance is shorter, the air outlet is smoother, and the heat dissipation effect is improved.

[0118] In some embodiments, reference Figure 6-Figure 8 The maximum distance d1 between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is equal to the maximum distance d2 between the rotation axis of the crossflow impeller 31 and the other end of the condenser 21 .

[0119] The distance between the horizontal lines from the rotation axis of the cross-flow impeller 31 as the starting point to one end of the condenser 21 as the end point is the longest distance. The term "equal" can be understood as equal to or approximately equal to. The rotation axis of the cross-flow impeller 31 is roughly located on the perpendicular bisector of the horizontal lines connecting the opposite ends of the condenser 21 (the first end 21a and the second end 21b). The horizontal lines connecting the opposite ends of the condenser 21 and the horizontal lines connecting the rotation axis of the cross-flow impeller 31 from one end of the condenser 21 (the first end 21a) and the horizontal lines connecting the rotation axis of the cross-flow impeller 31 from the other end of the condenser 21 (the second end 21b) form an isosceles triangle.

[0120] See also Figure 6-Figure 8 In a top view, a distance d1 between a rotation axis of the crossflow impeller 31 of the crossflow fan 30 and a horizontal line connecting the first end 21a of the condenser 21 is approximately equal to a distance d2 between a rotation axis of the crossflow impeller 31 of the crossflow fan 30 and a horizontal line connecting the second end 21b of the condenser 21.

[0121] The maximum distance between the rotation axis of the through-flow impeller 31 and one end of the condenser 21 is approximately equal to the maximum distance between the rotation axis of the through-flow impeller 31 and the other end of the condenser 21. When the through-flow impeller 31 rotates, the airflow passing through the condenser 21 can cover the entire condenser 21 as much as possible, so that the airflow passes through the condenser 21 more evenly, thereby further improving the heat exchange efficiency of the condenser 21 and reducing noise.

[0122] In some embodiments, the closest distance d3 between the rotation axis of the crossflow impeller 31 and the condenser 21 is ( Figure 7 As shown) is greater than or equal to 10% of the radius R of the cross-flow impeller 31.

[0123] The appropriate distance between the cross-flow impeller 31 and the condenser 21 can increase the area of ​​the airflow passing through the condenser 21, thereby improving the heat exchange efficiency and reducing the noise.

[0124] In some embodiments, the condenser 21 includes a first surface facing the cross flow fan 30 , and the first surface includes at least one flat surface or at least one curved surface.

[0125] The condenser 21 has a first surface (leeward surface) facing the crossflow fan 30 and a windward surface facing away from the crossflow fan 30, and the first surface can be composed of one surface or multiple surfaces. For example, the first surface of the condenser 21 is a plane or an arcuate surface composed of one surface, and the arcuate surface can be an arcuate surface protruding toward the crossflow fan 30, or an arcuate surface protruding away from the crossflow fan 30. For another example, the first surface of the condenser 21 is an arcuate surface surrounded by multiple surfaces, and the multiple surfaces can be planes and / or arcuate surfaces. The first arcuate surface can be formed by connecting and splicing multiple condensers to each other, or by bending a single condenser to form the arcuate first surface.

[0126] Figure 6 It is exemplarily shown in FIG. 1 that the first surface of the condenser 21 is a plane. Figure 7 and Figure 8 It is exemplarily shown that the first surface of the condenser 21 is a curved surface.

[0127] The first surface of the condenser 21 is an arc-shaped surface, which can increase the heat exchange area of ​​the condenser 21 and improve the heat exchange efficiency.

[0128] In some embodiments, a projection of the first surface of the condenser 21 along a second direction on the plane where the air outlet 12 is located at least partially overlaps with the air outlet 12 , and the second direction is perpendicular to the first direction.

[0129] When the first surface of the condenser 21 completely overlaps the air outlet 12, the area of ​​the condenser 21 is substantially equal to the area of ​​the air outlet 12. When the first surface of the condenser 21 partially overlaps the air outlet 12, the area of ​​the condenser 21 may be greater than the area of ​​the air outlet 12.

[0130] For example, refer to Figure 6-Figure 8 The housing 10 is a rectangular parallelepiped with an opening on one side along the second direction, the opening serving as the air outlet 12, and the first surface of the condenser 21 can be perpendicular to the second direction, in which case the first surface of the condenser 21 completely overlaps the air outlet 12. The first surface of the condenser 21 can be inclined to the second direction, in which case the first surface of the condenser 21 partially overlaps the air outlet 12.

[0131] The projection of the first surface of the condenser 21 along the second direction on the plane where the air outlet 12 is located at least partially overlaps with the air outlet 12, so that the condenser is at least partially facing the outlet, thereby reducing wind resistance, making the air outlet smoother, and reducing noise.

[0132] In some embodiments, the first surface of the condenser 21 is a plane and is tilted relative to the second direction.

[0133] Compared with a condenser arranged perpendicular to the second direction, a condenser arranged obliquely can increase the heat exchange area, thereby improving the heat exchange efficiency.

[0134] See also Figure 6 and Figure 7 In a specific example, the housing 10 is generally in the shape of a rectangular parallelepiped, and the first surface of the condenser 21 intersects with the plane L where the center of the housing 10 is located and is asymmetric with respect to the plane L where the center of the housing 10 is located. The plane L where the center of the housing 10 is located is a plane extending along the first direction and the second direction and perpendicular to the third direction, and the center line of the housing 10 extending along the first direction and the center line extending along the second direction are located in the plane.

[0135] As an example, see Figure 6 In a top view, the first surface of the condenser 21 is substantially a plane, and intersects with the plane L where the center of the housing 10 is located and has an acute angle, that is, it is tilted relative to the plane L where the center of the housing 10 is located, and the rotation axis of the crossflow impeller 31 is biased to one side relative to the plane L where the center of the housing 10 is located, for example, located at a corner of the housing 10. Compared with a shape that is symmetrical and perpendicular to the plane L where the center of the housing 10 is located, the tilted condenser 21 has a larger heat exchange area, thereby improving the heat exchange efficiency of the heat exchange device 21.

[0136] As another example, see Figure 7In a top view, the first surface of the condenser 21 is roughly an arc surface, and the straight line connecting the two opposite ends of the condenser 21 (the first end 21a and the second end 21b) intersects with the plane L where the center of the shell 10 is located and has an acute angle, so that the first surface of the condenser 21 is asymmetric with respect to the plane L where the center of the shell is located, and the rotation axis of the crossflow impeller 31 is biased to one side relative to the plane L where the horizontal center of the shell 10 is located. Compared with the symmetry, the heat exchange area of ​​the condenser 21 is larger, thereby improving the heat exchange efficiency of the heat exchange device 21. Such an arrangement of the crossflow impeller 31 and the condenser 21 also helps to increase the heat exchange area while allowing the airflow to be quickly discharged out of the shell 10. It should be noted that Figure 7 The condenser 21 shown in FIG. 1 is asymmetrical about the plane L, but Figure 7 The condenser 21 shown may itself be of symmetrical shape.

[0137] In some embodiments, the first surface of the condenser 21 intersects with a surface L where the center of the housing 10 is located and is symmetrical with respect to a plane L where the center of the housing is located.

[0138] As an example, see Figure 8 In a top view, the first surface of the condenser 21 is roughly an arc surface, and the horizontal line connecting the two opposite ends (the first end 21a and the second end 21b) of the condenser 21 is perpendicular to the plane L where the horizontal center of the shell 10 is located. The first surface of the condenser 21 is symmetrical about the plane L where the horizontal center of the shell 10 is located, and the rotation axis of the cross-flow impeller 31 is located on the plane L where the horizontal center of the shell 10 is located. Compared with asymmetry, the airflow can pass through the condenser 21 more evenly, thereby facilitating uniform heat exchange and reducing noise.

[0139] By making the first surface of the condenser 21 intersect with the plane L where the center of the shell 10 is located and being symmetrical about the plane L where the center of the shell is located, the uniformity of the airflow passing through the condenser 21 can be improved, thereby facilitating uniform heat exchange and reducing noise.

[0140] In some embodiments, the first surface of the condenser 21 is an arc-shaped surface and partially surrounds the cross-flow impeller 31 .

[0141] The arc-shaped opening of the first surface of the condenser 21 faces the cross-flow impeller 31 , that is, the concave portion of the arc-shaped surface faces the cross-flow impeller 31 .

[0142] By having the first surface being an arc-shaped surface and partially surrounding the cross-flow impeller, the heat exchange area of ​​the airflow passing through the condenser can be increased, thereby further improving the heat exchange efficiency of the condenser and reducing noise.

[0143] In some embodiments, see Figure 7 and Figure 8The first surface of the condenser 21 is a substantially arc surface, and the rotation axis of the cross-flow impeller 31 coincides with the arc center of the arc surface of the condenser 21 .

[0144] exist Figure 8 In the specific example shown, the first surface of the condenser 21 can be regarded as a section of a cylindrical surface on an imaginary cylindrical surface with a radius r and a center coinciding with the axis of the cross-flow impeller 31. In this case, the maximum distance from the rotation axis of the cross-flow impeller 31 to one end of the condenser 21 and the maximum distance d2 from the rotation axis of the cross-flow impeller 31 to the other end of the condenser 21 are equal or approximately equal.

[0145] The rotation axis of the cross-flow impeller 31 coincides with the arc center of the arc surface of the condenser 21, so that the distance from the rotation axis of the cross-flow impeller 31 to each position of the arc surface of the condenser 21 is the same, thereby further improving the uniformity of the airflow through the condenser 21, improving the heat exchange efficiency of the condenser 21, and reducing noise.

[0146] In some embodiments, see Figures 6 to 8 The shell 10 includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet 12 is located between the first shell wall and the second shell wall, and both ends of the condenser 21 are respectively arranged on the first shell wall and the second shell wall, and the third direction is perpendicular to both the first direction and the second direction.

[0147] The two ends (first end 21a, second end 21b) of the condenser 21 can be respectively against or bonded to the first shell wall and the second shell wall, thereby improving the sealing effect between the condenser 21 and the shell 10 and reducing the risk of air leakage. As a result, the airflow in the inner cavity 10a of the shell 10 passes through the condenser 21, reducing the risk of air leakage and improving the heat exchange efficiency.

[0148] In some embodiments, the crossflow fan 30 includes a fan housing 32 , and the crossflow impeller 31 is rotatably disposed in the fan housing 32 . The fan housing 32 includes an inner guide surface, and the inner guide surface is used to guide the airflow toward the air outlet 12 side.

[0149] The fan housing 32 has an air inlet, an air outlet, and an air duct between the air inlet and the air outlet. The crossflow impeller 31 is rotatably disposed in the air duct. The crossflow impeller 31 can be driven to rotate by a motor fixed to the fan housing 32. The inner guide surface of the fan housing 32 is the surface facing the crossflow impeller 31. The air inlet of the fan housing 32 faces the condenser 21, and the air outlet of the fan housing 32 is connected to the air outlet. For example, the air outlet is located at the air outlet, and the opening size of the air outlet is consistent with that of the air outlet.

[0150] The inner guide surface allows air to be discharged more smoothly from the air outlet 12 , thereby reducing wind resistance and noise.

[0151] As an example, the inner guide surface is a curved surface.

[0152] The arc-shaped inner guide surface further enables the airflow to be discharged from the air outlet 12 more smoothly, thereby reducing wind resistance and noise.

[0153] In some embodiments, see Fig. 9 The heat exchange assembly 20 further includes a compressor 22, an evaporator 23 and an expansion valve 24. The compressor 22, the condenser 21, the evaporator 23 and the expansion valve 24 are connected in sequence through a refrigerant circulation pipeline to form a refrigerant circulation loop. The refrigerant may be Freon.

[0154] As an example, the evaporator 23 may include two flow channels, one of which serves as a refrigerant flow channel for circulating the refrigerant, and the other serves as a liquid cooling flow channel for communicating with a battery heat exchanger in the energy storage device, thereby exchanging heat with the battery through the battery heat exchanger.

[0155] Through the refrigerant circulation loop, heat can be continuously exchanged for the batteries in the energy storage device, reducing the risk of thermal runaway of the batteries.

[0156] A specific example of the present application is described below.

[0157] The present application provides a heat exchange device, see Figure 4-Figure 9 , a shell 10, a heat exchange component 20 and a cross-flow fan 30.

[0158] The shell 10 has an air inlet 11, an air outlet 12 and an inner cavity 10a connected to the air inlet 11 and the air outlet 12. The inner cavity 10a forms an air duct. The air outlet 12 is a long strip opening extending along a first direction on one side of the shell 10. The heat exchange component 20 is arranged in the inner cavity 10a, including a compressor 22, an evaporator 23, an expansion valve 24 and a condenser 21 connected in sequence through a refrigerant circulation pipeline, wherein the refrigerant is Freon. The condenser 21 is located between the air inlet 11 and the air outlet 12. The condenser 21 has a windward surface and a first surface. The windward surface is close to the air inlet 11 side, and the first surface is close to the air outlet 12 side. The first surface can be a plane or an arc surface. The condenser 21 is in contact with the shell 10. The crossflow fan 30 is disposed in a cavity near the air outlet 12 in the inner cavity 10a and is located between the condenser 21 and the air outlet 12. The crossflow fan 30 includes a fan casing 32 and a crossflow impeller 31 rotatably disposed in the fan casing 32. The fan casing 32 has an inlet end, an outlet end, and a wind cavity located between the inlet end and the outlet end. The crossflow impeller 31 is located in the wind cavity. The inlet end of the fan casing 32 faces the first surface of the condenser 21, and the outlet end of the fan casing 32 is connected to the air outlet 12. The extension direction of the rotation axis of the crossflow impeller 31 is consistent with the extension direction of the long strip air outlet of the housing 10. The farthest distance between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is approximately equal to the farthest distance between the rotation axis of the crossflow impeller 31 and the other end of the condenser 21.

[0159] The crossflow fan 30 takes away the heat in the inner cavity 10a and cools the condenser 21. Compared with the axial flow fan, the crossflow fan can make the airflow flow through the condenser in a larger and more uniform area, reduce wind resistance, and thus improve the heat exchange efficiency and reduce noise. In addition, since the crossflow fan 30 is located in the inner cavity 10a, it can further reduce noise compared with the axial flow fan arranged outside the shell 10. The maximum distance between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is roughly equal to the maximum distance between the rotation axis of the crossflow fan 30 and the other end of the condenser 21. When the crossflow impeller 31 rotates, the airflow can cover the entire condenser 21 as much as possible, so that the airflow passes through the condenser 21 more evenly, thereby further improving the heat exchange efficiency of the condenser 21 and reducing noise.

[0160] The second aspect of the present application provides an energy storage device, see Figure 1 , including: an energy storage box 110, which accommodates at least one battery 120; a heat exchange device 100 as mentioned in any of the above embodiments; and a battery heat exchange component, through which the battery 120 exchanges heat with the heat exchange device 100.

[0161] As an example, the battery heat exchanger includes a liquid circulation pipeline and a circulation pump for driving the circulation of liquid in the liquid circulation pipeline, and the battery exchanges heat with the heat exchange device through the liquid circulation pipeline. For example, the circulation pipeline is connected to the liquid cooling channel of the evaporator 23, thereby exchanging heat with the evaporator 23.

[0162] In some embodiments, the heat exchange device 100 is disposed in an energy storage box 110, and the energy storage box 110 is provided with an exhaust port connected to the air outlet 12. The airflow discharged from the air outlet 12 of the heat exchange device 100 is discharged outside the energy storage box 110 through the exhaust port.

[0163] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A heat exchange device, characterized in that: include: A shell, comprising an inner cavity and an air inlet and an air outlet communicated with the inner cavity; A heat exchange assembly, comprising a condenser, wherein the condenser is disposed in the inner cavity and between the air inlet and the air outlet; A cross-flow fan is arranged in the inner cavity, and the cross-flow fan includes a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet.

2. The heat exchange device according to claim 1, characterized in that: The air outlet is configured in a long strip shape extending along a first direction, and an extending direction of a rotation axis of the cross-flow impeller coincides with the first direction.

3. The heat exchange device according to claim 2, characterized in that: Along the first direction, the cross-flow impeller extends from one end of the air outlet to the other end.

4. The heat exchange device according to claim 1, characterized in that: The cross-flow fan and the condenser are arranged at positions adjacent to the air outlet.

5. The heat exchange device according to claim 1, characterized in that: The maximum distance between the rotation axis of the crossflow impeller and one end of the condenser is equal to the maximum distance between the rotation axis of the crossflow impeller and the other end of the condenser.

6. The heat exchange device according to claim 5, characterized in that: The closest distance between the rim of the cross-flow impeller and the condenser is greater than or equal to 10% of the radius of the cross-flow impeller.

7. The heat exchange device according to claim 5, characterized in that: The condenser includes a first surface facing the cross-flow impeller, and the first surface includes at least one flat surface or at least one arc-shaped surface.

8. The heat exchange device according to claim 7, characterized in that: A projection of the first surface of the condenser on the plane where the air outlet is located along a second direction at least partially overlaps with the air outlet, the second direction is perpendicular to the first direction, and the first direction is consistent with an extension direction of a rotation axis of the cross-flow impeller.

9. The heat exchange device according to claim 8, characterized in that: The first surface is a plane and is inclined relative to the second direction.

10. The heat exchange device according to claim 8, characterized in that: The first surface is an arc-shaped surface and partially surrounds the cross-flow impeller.

11. The heat exchange device according to claim 10, characterized in that: The first surface is an arc surface, and the rotation axis of the cross-flow impeller coincides with the arc center of the arc surface.

12. The heat exchange device according to any one of claims 1 to 10, characterized in that: The shell includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet is located between the first shell wall and the second shell wall, two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, the third direction, the first direction and the second direction are perpendicular to each other, and the first direction is consistent with the extension direction of the rotation axis of the cross-flow impeller.

13. The heat exchange device according to any one of claims 1 to 10, characterized in that: The crossflow fan comprises a fan housing, and the crossflow impeller is rotatably disposed in the fan housing. The fan housing includes an inner guide surface, and the inner guide surface is used to guide the airflow toward the air outlet side.

14. The heat exchange device according to claim 13, characterized in that: The inner guide surface comprises an arc-shaped guide surface.

15. The heat exchange device according to any one of claims 1 to 10, characterized in that: The heat exchange component also includes a compressor, an evaporator and an expansion valve. The compressor, the condenser, the evaporator and the expansion valve are connected through a refrigerant circulation pipeline.

16. An energy storage device, characterized in that: include: An energy storage box storing at least one battery; The heat exchange device according to any one of claims 1 to 15, used for exchanging heat with the battery.

17. The energy storage device according to claim 16, characterized in that: The heat exchange device is arranged in the energy storage box, and the energy storage box is provided with an exhaust port communicated with the air outlet.

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